MentalHealthDaily

GLP-1 Drugs Suppress Reward Feeding Through an Amygdala-Dopamine Circuit

by GLOOM

MHD featured image for GLP-1 drugs, reward feeding, amygdala signaling, and dopamine circuitry.

GLP-1 drugs are usually described as appetite drugs, but a 2026 Nature mouse study mapped a more specific reward circuit: small-molecule GLP-1 receptor agonists suppressed palatable-food intake through Glp1r-expressing central-amygdala neurons that reduced dopamine release in the nucleus accumbens during high-fat-food retrieval.1 That mechanism makes binge-eating and substance-use hypotheses more plausible without turning an animal …

Stop-Signal Task Links Cannabis Use to Decision Efficiency, Not Inhibition

by GLOOM

MHD featured image for stop-signal task modeling, evidence accumulation, and cigarette-plus-cannabis use.

A 2026 IMAGEN stop-signal task analysis found that evidence accumulation, response caution, and go-failure probability predicted cigarette-plus-cannabis use at ages 19 and 23, while inhibition parameters showed no apparent substance-use association.1 The calibrated reading is direct: conventional “poor inhibition” language may be too crude when the cigarette-plus-cannabis signal sits in general decision-making efficiency instead. Research …

Latin American Drug Checking Services Face Legal and Funding Barriers

by GLOOM

A 2026 survey of 38 drug checking services found that Latin American programs faced a different operating reality than US programs: funding was a major barrier more often (80% vs. 54%), drug checking equipment was legally permitted less often (44% vs. 75%), and law enforcement confiscation of checking supplies was reported more often (38% vs. …

Risky Alcohol Use Doubled Aneurysm Rupture Odds; THC Signal Was Null

by GLOOM

MHD featured image for risky alcohol use, THC, and aneurysmal subarachnoid hemorrhage risk.

A 2026 prospective German aneurysm cohort found risky alcohol use in 4.6% of 954 intracranial aneurysm patients, and that exposure carried 2.00x higher adjusted odds of aneurysm rupture plus 3.26x higher adjusted odds of clinically severe aneurysmal subarachnoid hemorrhage. Research Highlights Risky alcohol was the main signal: drinking above the study threshold was independently associated …

Semaglutide Reduced Cocaine Choice in Rat Study

by GLOOM

Semaglutide is not close to being an approved cocaine-use-disorder medication, but a 2026 rat study gives the idea a more demanding preclinical test than ordinary self-administration experiments. After 5 days of treatment, rats shifted away from cocaine choice without losing total operant responding, which separates the result from a broad appetite-suppression artifact. Research Highlights Semaglutide …

Eutylone Inhibits CYP2D6 Like MDMA: Polydrug Interaction Risk

by GLOOM

MHD featured image for eutylone, CYP2D6 inhibition, and polydrug interaction risk.

A 2026 cross-species metabolism study found that eutylone, a synthetic cathinone stimulant sometimes sold as a “bath salt” or MDMA-like drug, inactivated CYP2D6 with Ki = 4.2 μM, kinact = 0.069 min-1, and inactivation efficiency = 1.64 x 10-2 min-1 μM-1 — a range the researchers described as comparable to MDMA. Research Highlights CYP2D6 was …

Smoking Linked to 1.75x Higher Sleep Apnea Severity in Pomerania Study

by GLOOM

MHD featured image for smoking history and obstructive sleep apnea severity in a population polysomnography study.

A 2026 population-based polysomnography study involving 1,206 adults found current smokers had 1.75x higher odds of worse obstructive sleep apnea severity than non-smokers or occasional smokers after adjustment for age and body mass index. Former smokers showed almost the same overall signal — 1.76x higher odds than never smokers — but that part of the …